Mark Cassino lives in Kalamazoo, Michigan, with his wife Pam and their three cats. Mark is a fine art and natural history photographer. He started photographing snow crystals in his garage in 1997.
Jon Nelson is a retired ice physicist who taught meteorology and cloud physics at the University of Arizona. He now lives in Bellingham, Washington, where he still likes to dabble in writing and research whenever he is not out trying to climb something.